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<head>
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  <title>Document</title>
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<body>
  <script>
    // 同时发送多个请求
    console.log("请求A的数据");
    setTimeout(() => {
      console.log("请求A的数据成功");
    }, 1500)

    console.log("请求B的数据");
    setTimeout(() => {
      console.log("请求B的数据成功");
    }, 2500)

    console.log("请求C的数据");
    setTimeout(() => {
      console.log("请求C的数据成功");
    }, 3500)
  </script>
</body>

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